Why was i banned

I made a post in the spam forum named "Disgusting"

i said dont go here if your under 18

and i had a link leading to a pic of a old lady nude infront of a camera
which was pretty nasty but the fact is i made the thread in the spam thread where i thot anything was aloud plus i even warned to not click if under 18 was a 1 month ban neccesary ? i think not